EP0488661B1 - Papierförderer und Bilderzeugungsgerät hierfür - Google Patents

Papierförderer und Bilderzeugungsgerät hierfür Download PDF

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Publication number
EP0488661B1
EP0488661B1 EP91310901A EP91310901A EP0488661B1 EP 0488661 B1 EP0488661 B1 EP 0488661B1 EP 91310901 A EP91310901 A EP 91310901A EP 91310901 A EP91310901 A EP 91310901A EP 0488661 B1 EP0488661 B1 EP 0488661B1
Authority
EP
European Patent Office
Prior art keywords
document
feed
image forming
forming apparatus
paper
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP91310901A
Other languages
English (en)
French (fr)
Other versions
EP0488661A2 (de
EP0488661A3 (en
Inventor
Kunihiro Oonishi
Eiji Gotou
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kyocera Mita Industrial Co Ltd
Original Assignee
Mita Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2339112A external-priority patent/JP2897425B2/ja
Priority claimed from JP2339110A external-priority patent/JPH08642B2/ja
Application filed by Mita Industrial Co Ltd filed Critical Mita Industrial Co Ltd
Publication of EP0488661A2 publication Critical patent/EP0488661A2/de
Publication of EP0488661A3 publication Critical patent/EP0488661A3/en
Application granted granted Critical
Publication of EP0488661B1 publication Critical patent/EP0488661B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/60—Apparatus which relate to the handling of originals
    • G03G15/607—Apparatus which relate to the handling of originals for detecting size, presence or position of original
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/55—Self-diagnostics; Malfunction or lifetime display
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00172—Apparatus for electrophotographic processes relative to the original handling
    • G03G2215/00177—Apparatus for electrophotographic processes relative to the original handling for scanning
    • G03G2215/00181—Apparatus for electrophotographic processes relative to the original handling for scanning concerning the original's state of motion
    • G03G2215/00185—Apparatus for electrophotographic processes relative to the original handling for scanning concerning the original's state of motion original at rest

Definitions

  • This invention relates to a paper feeder provided independently from an image forming apparatus for feeding copy paper to the image forming apparatus, and also an image forming apparatus provided with a paper feeder.
  • This paper feeder has two types of cutting modes in which a roll of copy paper (roll paper) is cut to be fed to the image forming apparatus: a normal cutting mode and a synchronous cutting mode.
  • the normal cutting mode the roll paper is cut to a size set in an operation unit.
  • the synchronous cutting mode when a trailing end of a document to be fed to an exposure unit is detected by a document sensor provided in a rear portion of a document setting portion of the image forming apparatus, whereby the sensor detects a size of the document, the roll paper is automatically cut in correspondence with the document size. More specifically, in the case where the synchronous cutting mode is selected, a leading end of the roll paper is transported from the paper feeder to a specified position in the image forming apparatus. After the feed of the document and that of the roll paper are started in synchronism with each other, the roll paper is automatically cut upon the document sensor detecting the trailing end of the document.
  • some examples of image forming apparatus of the above type are provided with correcting mechanism for automatically setting the document in position in the case where the document is set obliquely with respect to a feeding direction thereof.
  • this mechanism has resulted in a complicated construction and a higher cost.
  • the trailing end of the document cannot be detected. Accordingly, the roll paper is cut to a specified size irrespectively of the document size.
  • An image forming apparatus with document feed means is also known in which a lateral side of a document to be copied is detected by document detection means correspondingly positioned in relation to the document feed means in order to prevent operation of the image forming apparatus if a grossly skewed document is detected (US-A 4132401).
  • a paper feeder for use with an image forming apparatus having a document setting means in which a document to be copied is set, the paper feeder being removably attachable to the image forming apparatus and having feed means for feeding copy paper to the image forming apparatus, document detector means for detecting a lateral side of the document to be copied, said detector means being mountable at a corresponding region of said document setting means in such a position as to face said lateral side of the document set in said means, determination means for determining the presence or absence of the document in the document setting means on the basis of the response of said detector means, and warning means for notifying an operator of an error in setting the document upon the absence of the document being determined by the determination means.
  • Such a paper feeder can be a separable or independent unit requiring no electrical or mechanical connection with the image forming apparatus itself other than that the document detector means of the feeder requires to be mounted on the document setting means.
  • the warning means is controlled by elements of the paper feeder itself and does not rely on a controller in the main body of the image forming apparatus.
  • the document detector means may be mounted to an upstream portion of the document setting means of the image forming apparatus with respect to a document feeding direction.
  • a paper feeder according to the invention may further comprise feed prohibition means for prohibiting the feed of the copy paper upon the absence of the document being determined by the determination means, and reset means for enabling the feed of the copy paper upon the presence of the document being determined by the determination means after the error is notified.
  • the feed of the copy paper is enabled upon the presence of the document being determined by the determination means before the start of the image forming operation.
  • the feed of the copy paper is prohibited upon the absence of the document being determined by the determination means before the start of the image forming operation, whereupon an occurrence of an error in setting the document is notified to an operator by the warning means.
  • prohibition of the feed of the copy paper and the error warning are automatically cleared. Accordingly. it can be prevented that an image of the document is copied on the copy paper obliquely, or on the copy paper having a size in disagreement with the size of the document.
  • an image forming apparatus having a paper feeder having the document setting detection and warning means referred to above.
  • Fig. 2 is a schematic diagram showing a side elevation of a paper feeder 1 attached to a copying machine (image forming apparatus) 2.
  • the copying machine 2 is supported on a copy paper stocking frame 3.
  • a document set on a document setting portion 4 is fed to an exposure unit 5 in which an image thereof is scanned, and the scanned image is copied onto copy paper inserted through a copy paper inlet 6.
  • a pair of register rollers 61 are adapted for feeding roll paper 8 in such a manner that feeding of the document is conducted in synchronism with that of the roll paper 8. More specifically, a leading end of the roll paper 8 is detected by an unillustrated leading end sensor.
  • the pair of register rollers 61 responsive to the leading end sensor, feed the roll paper 8 in such a registered manner as to match the leading end of the roll paper 8 up with that of the document whose image is to be scanned in the exposure unit 5.
  • the document After the document image is scanned in the exposure unit 5, the document is transported to the left in the place of Fig. 2.
  • the copy paper having the document image copied thereon is discharged onto a discharge tray 7 opening obliquely upward disposed at an upper portion of the paper feeder.
  • the paper feeder 1 is attached to a front side wall (right side wall in Fig. 2) of the stocking frame 3 and is movable upward and downward.
  • the roll paper (copy paper) 8 is mounted on a roll shaft.
  • a holding roller 9 Arranged above the roll paper 8 along a direction upward therefrom are a holding roller 9, a pair of feed rollers 10, 11, a pair of cutters 12, 13, and a pair of discharge rollers 14, 15.
  • a delivery opening 16 for the roll paper 8 is provided above the discharge rollers 14, 15. A leading end of the roll paper 8 is fed by the feed rollers 10, 11 to the cutters 12, 13.
  • the cutter 12 is in the form of a cylinder partly cut away along a plane, and drivingly rotated by an unillustrated drive means.
  • the cutter 13 is disposed as opposed to the cutter 12 with a paid-off portion of the roll paper 8 interposed therebetween.
  • an edge at the intersection of the plane with a cylindrical surface providing the outer periphery of the cutter 12 comes into frictional contact with an edge of the other cutter 13, thereby the roll paper 8 is cut.
  • the discharge rollers 14, 15 are in pressing contact with each other, and adapted for transporting the roll paper 8 to the copy paper inlet 6.
  • a document detecting unit 17 is disposed at one lateral side of an upstream portion of the document setting portion 4 with respect to the document feeding direction in such a position as to face corresponding one lateral side face of the document set in the document setting portion 4.
  • the document detecting unit 17 includes a document sensor 18 for detecting presence or absence of the document. More specifically, the document detecting unit 17 has a document inlet 171 provided at a rear end thereof with respect to the document feeding direction.
  • the document inlet 171 is configured in a U-shape opening in a widthwise direction of the document setting portion 4, i.e., in a direction vertical to the plane of Fig. 2, and the U-shaped portion thereof defines a document path 172 through which the document is inserted.
  • the document sensor 18 is provided above the document path 172.
  • the sensor 18 includes a photosensor or the like and is adapted for detecting the presence or absence of the document in the document path. and sends a corresponding sensor signal to a control unit 23 to be described below.
  • the sensor 18 detects the document only in the case where the document is properly set in the document setting portion 4 through the document path 172.
  • an operation unit 19 comprises ten number entry keys (ten keys) 191, a clear key 192, a start key 193, a stop key 194, a synchronous cutting mode selection key 195, indicators 196, 197, and the like.
  • the ten keys 191 are manipulated to set a size to which the roll paper 8 is to be cut, and a number of necessary cut sheets.
  • the clear key 192 is manipulated for clearing an error indication or other indication.
  • the synchronous cutting mode selection key 195 is manipulated to change a cutting mode to the synchronous cutting mode.
  • the indicator 196 is adapted for displaying the set cut size of the roll paper 8, and the indicator 197 is adapted for displaying the set number of cut sheets.
  • Contents set by the keys in the operation unit 19 are output to the control unit 23.
  • a main motor 20 is drivingly rotated in accordance with a control signal sent from the control unit 23.
  • a feed clutch 21 is enagged upon receipt of a control signal from the control unit 23. The feed clutch 21 is adapted for transmitting the rotational force of the main motor 20 to the pairs of feed rollers 10, 11 and discharge rollers 14, 15 upon engagement.
  • a display unit 22 is provided in a specified position of the paper feeder 1 for displaying an error indication in accordance with an error signal sent from the control unit 23.
  • control unit 23 on-off controls the main motor 20 and the feed clutch 21, and sends the error signal to the display unit 22.
  • the routine is initiated by depressing the selection key 195 so as to change a cutting mode to the synchronous cutting mode in Step S1.
  • the document sensor 18 detects the presence or absence of the document in Step S3.
  • the main motor 20 is caused to drivingly rotate in Step S4 and the feed clutch 21 is engaged in Step S5.
  • the roll paper 8 is fed by the pairs of feed rollers 10, 11 and discharge rollers 14, 15 through the copy paper inlet 6 to the pair of register rollers 61.
  • the feed of the document and that of the roll paper 8 are started in synchronism with each other, whereby an image of the document is copied onto the roll paper 8.
  • Step S6 the document sensor 18 detects the trailing end of the document when the document passing through the document detecting unit 17.
  • the cutter 12 is drivingly rotated to cut the roll paper 8, so that the size of the cut sheet of the roll paper 8 corresponds with that of the document. In this way, a synchronous cutting operation is executed, and whereby this routine is completed.
  • the above predetermined size irrespective of the document size is a size, for example, having a length more than the longest distance between the roller pairs adapted for transporting the roll paper 8 in the copying machine 2 and indicated in broken lines in Fig. 2 so that the cut sheet of the roll paper 8 is not likely to cause a jam in the copying machine 2.
  • control unit 23 constantly detects the presence or absence of the document in accordance with the sensor signal sent from the document sensor 18.
  • the routine is initiated by depressing the selection key 195 so as to change a cutting mode to the synchronous cutting mode in Step S11.
  • the document sensor 18 detects the presence or absence of the document in Step S13.
  • the main motor 20 is caused to drivingly rotate in Step S14 and the feed clutch 21 is engaged in Step S15.
  • the roll paper 8 is fed by the pairs of feed rollers 10, 11 and discharge rollers 14, 15 through the copy paper inlet 6 to the pair of register rollers 61.
  • the feed of the document and that of the roll paper 8 are started in synchronism with each other, whereby an image of the document is copied onto the roll paper 8.
  • Step S16 the document sensor 18 detects the trailing end of the document when the document passing through the document detecting unit 17.
  • the cutter 12 is drivingly rotated to cut the roll paper 8, so that the size of the cut sheet of the roll paper 8 corresponds with that of the document. In this way, asynchronous cutting operation is executed, and whereby this routine is completed.
  • Step S18 the feed of the roll paper 8 is enabled and the error indication on the display unit 22 is cleared in Step S20.
  • the roll paper 8 is fed to the copy paper inlet 6.
  • the presence of the document may be detected (YES in Step S19) upon the document being set properly after the error indication is displayed on the display unit 22 (NO in Step S18), instead of depressing the start key 193 on.
  • the feed of the roll paper 8 is enabled and the error indication on the display unit 22 is cleared in Step S20, and the routine returns to Step S12. Subsequently, when the start key 193 is depressed on in Step S12, the roll paper 8 is fed to copy paper inlet 6.
  • the paper feeder 1 it is detected in the paper feeder 1 whether the document is properly set in the document setting portion 4 before the copying operation is started in the copying machine 2.
  • the feed of the roll paper 8 is prohibited and the error indication is displayed in the display unit 22.
  • the feed of the roll paper 8 can be enabled and the error indication can be cleared by depressing the clear key 192.
  • the feed of the roll paper 8 can be enabled and the error indication can be cleared automatically respectively by properly setting the document in the document setting portion 4.
  • the error indication is displayed on the display unit 22 so as to notify the operator of the likelihood of an erroneous copying operation.
  • a buzzer or other sound alarm device may be provided, instead of the display unit 22, so as to notify the operator of the likelihood of the erroneous copying operation by buzzing sounds.
  • it may be appropriate, for example, to cause the indicators 196, 197 to light on and off upon detecting the likelihood of the erroneous copying operation, instead of provision of the display unit 22.
  • the roll paper 8 is cut to be fed to the copying machine 2.
  • the present invention can also be applied to a paper feeder for feeding copy sheet of a specified size. By incorporating the present invention into such a paper feeder, there can be prevented an erroneous copying operation due to the obliquely set document.
  • the roll paper 8 is fed to the copy paper inlet 6 when the start key 193 is depressed on after the error indication is cleared.
  • an operation routine may be such that it returns to Step S13 from Step S20 instead of returning to Step 12. In other words, when the document is properly set in the document setting portion 4 after the error indication is cleared, the presence of the document is detected. This is immediately followed by the start of feeding of the roll paper 8 to the copying machine 2.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Controlling Sheets Or Webs (AREA)

Claims (6)

  1. Papierzuführung (1) zur Verwendung bei bzw. mit einem Bilderzeugungsgerät (2) mit einem Dokumentenpositionierungsmittel (4), in dem ein zu kopierendes Dokument positioniert ist, wobei die Papierzuführung (1) abnehmbar am Bilderzeugungsgerät befestigt werden kann und Zuführungsmittel (10,11) zum Zuführen von Kopierpapier (8) zum Bilderzeugungsgerät (2) aufweist, sowie Dokumentendetektormittel (17) zum Detektieren einer lateralen Seite des zu kopierenden Dokuments, wobei die Detektormittel an einem entsprechenden Bereich der Dokumentenpositionierungsmittel (4) in einer solchen Position montierbar sind, daß sie der lateralen Seite des in den vorerwähnten Mitteln positionierten Dokuments zugewandt sind, Bestimmungsmittel (23) zum Bestimmen des Vorhandenseins oder Nichtvorhandenseins des Dokuments in den Dokumentenpositionierungsmitteln (4) auf der Basis der Reaktion der Detektormittel (17) und Warnmittel (22), um einen Benutzer von einem Fehler beim Positionieren des Dokuments in Kenntnis zu setzen, wenn das Nichtvorhandensein des Dokuments von den Bestimmungsmitteln (23) ermittelt wird.
  2. Papierzuführung nach Anspruch 1, worin das Dokumentendetektormittel (17) auf einem, bezogen auf eine Dokumentenzuführungsrichtung, stromaufwärts gelegenen Abschnitt der Dokumentenpositionierungsmittel montierbar ist.
  3. Papierzuführung nach Anspruch 1 oder 2, die weiters umfaßt:
    Zuführungsverhinderungsmittel zum Verhindern der Zuführung des Kopierpapiers, wenn von den Bestimmungsmitteln (23) das Nichtvorhandensein des Dokuments ermittelt wird; und
    Reset-Mittel, um die Zuführung des Kopierpapiers zu ermöglichen, wenn von den Bestimmungsmitteln das Vorhandensein des Dokuments ermittelt wird, nachdem der Fehler bemerkt wurde.
  4. Bilderzeugungsgerät, umfassend Dokumentenpositionierungsmittel (4), in dem ein zu kopierendes Dokument positioniert ist, Zuführungsmittel (1) zum Zuführen von Kopierpapier, Mittel zum Scannen eines Bildes des Dokuments und Kopieren des gescannten Dokumentenbildes auf das von der Papierzuführung (1) zugeführte Kopierpapier, Dokumentendetektormittel (17) zu einer lateralen Seite der Dokumentenpositionierungsmittel (4), um einer entsprechenden Seite eines zu kopierenden Dokumentes zugewandt zu sein bzw. zu werden, um zu ermitteln, ob das Dokument korrekt im Positionierungsmittel positioniert ist, Bestimmungsmittel (23) zum Ermitteln des Vorhandenseins oder Nichtvorhandenseins des Dokuments im Dokumentenpositionierungsmittel (4) auf der Basis der Reaktion der Detektormittel (17), und Warnmittel (22), um einen Benutzer von einem Fehler bei der Positionierung des Dokuments in Kenntnis zu setzen, wenn das Nichtvorhandensein des Dokuments von den Bestimmungsmitteln (23) ermittelt wird,
    dadurch gekennzeichnet, daß das Zuführmittel eine Papierzuführung (1) umfaßt, die abnehmbar am Hauptkörper (2) des Bilderzeugungsgerätes befestigbar ist,
    daß die Papierzuführung (1) mit den Dokumentendetektormitteln (17), Bestimmungsmitteln (23) und Warnmitteln (22) versehen ist, und daß
    die Dokumentendetektormittel (17) in der zugewandten Position bezogen auf ein Dokument im Positionierungsmittel (4) abnehmbar am Dokumentenpositionierungsmittel (4) des Hauptkörpers (2) montierbar sind.
  5. Bilderzeugungsgerät nach Anspruch 4, worin das Dokumentendetektormittel (17) an einem, bezogen auf eine Dokumentenzuführrichtung, stromaufwärts gelegenen Abschnitt des Dokumentenpositionierungsmittels montiert ist.
  6. Bilderzeugungsgerät nach Anspruch 4 oder 5, weiters umfassend:
    Zuführungsverhinderungsmittel zum Verhindern der Zuführung des Kopierpapiers, wenn das Nichtvorhandensein des Dokuments von den Bestimmungsmitteln (23) ermittelt wird; und
    Reset-Mittel, um die Zuführung des Kopierpapiers zu ermöglichen, wenn von den Bestimmungsmitteln das Vorhandensein des Dokuments ermittelt wird, nachdem der Fehler angezeigt wurde.
EP91310901A 1990-11-30 1991-11-27 Papierförderer und Bilderzeugungsgerät hierfür Expired - Lifetime EP0488661B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2339112A JP2897425B2 (ja) 1990-11-30 1990-11-30 給紙装置
JP339112/90 1990-11-30
JP2339110A JPH08642B2 (ja) 1990-11-30 1990-11-30 給紙装置
JP339110/90 1990-11-30

Publications (3)

Publication Number Publication Date
EP0488661A2 EP0488661A2 (de) 1992-06-03
EP0488661A3 EP0488661A3 (en) 1992-10-14
EP0488661B1 true EP0488661B1 (de) 1996-03-06

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP91310901A Expired - Lifetime EP0488661B1 (de) 1990-11-30 1991-11-27 Papierförderer und Bilderzeugungsgerät hierfür

Country Status (3)

Country Link
US (1) US5332207A (de)
EP (1) EP0488661B1 (de)
DE (1) DE69117678T2 (de)

Families Citing this family (3)

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US5499108C1 (en) * 1992-07-29 2001-01-16 Primax Electronics Ltd Document-driven scanning input device communicating with a computer
US5924686A (en) * 1996-10-25 1999-07-20 Pitney Bowes Inc. Method for controlling the velocity of sheet separation
KR100205595B1 (ko) * 1997-04-24 1999-07-01 윤종용 급지카세트의 용지유무 감지장치

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Also Published As

Publication number Publication date
DE69117678D1 (de) 1996-04-11
EP0488661A2 (de) 1992-06-03
US5332207A (en) 1994-07-26
DE69117678T2 (de) 1996-09-12
EP0488661A3 (en) 1992-10-14

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